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I have had 5 now injector lines for 1,2,7, 8 and now #2 again burst just above the injector connection??????? Anybody no why or how to prevent this from happing. Truck runs great until it becomes a mosquito fogger after the ruptures. The line doesn't come apart it always has a hair line vertical split about 1/8" in length. I am at a loss why...
 

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There is a specific sequence in which to tighten the injector lines to the fuel rails and to the injectors. If done incorrectly it will stress the lines and this happens. Are you following the proper torque specifications for the lines themselves as well?
 

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There is a specific sequence in which to tighten the fuel rail to the valve cover and lines to rail/injector. I am not in the habit of doing this, but I found these PDFs for the procedure in the FSM in another forum.

 
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